code: def rand_str(max_len=40):
      return "".join(
          random.sample(
              string.ascii_letters, random.randint(1, max_len)
          )
      )
  
file_path: mlflow/tests/generate_ui_test_data.py
imports: import argparse
  import itertools
  import random
  import string
  from random import random
  import mlflow
  from mlflow import MlflowClient
label_desc: Use image node_id 3 for calling a global function with example usage: rand_str(max_len) and returns: str